Help! Cambelt failure! - Page 2

AlanB · 13-07-08, 10:31 PM

Hi Tim,

Never a great idea to just assume the valves are bent; Even interference engines can run clear!

Take a few minutes and either check the valves, or chuck a cheap belt on and try it.

If it has survived, it is by far the cheapest option.

AlanB

TheTwelveQuidKid · 14-07-08, 01:19 AM

Quote:

Originally Posted by AlanB

Hi Tim,

Never a great idea to just assume the valves are bent; Even interference engines can run clear!

Take a few minutes and either check the valves, or chuck a cheap belt on and try it.

If it has survived, it is by far the cheapest option.

AlanB

Makes sense.
I don't know if a 1987 - 1800 carb engine has hydraulic tappets or not. If it has, then even if any valves have been hit, it might not be all bad news. Sometimes it only collapses the hydraulic lifters. This happened on a 1.8 golf. It arrived one day at a mate's workshop on the back of an RAC truck, which had collected it off the ferry from Ireland. One afternoon I was bored, so I had a look. The cambelt had gone, so just to see what would happen, I put a new belt on, timed it up and started it. It had a misfire on one cylinder, and some tappet noise. I took the rocker cover off, removed the belt and the camshaft. Then I looked at the tappets, and one was sitting lower than the rest. The owner of the car was a cheapskate at the best of times, so to help him out, I went to a scrap yard and found a hydraulic tappet, chucked it in the engine and put it back together. It worked fine, so when matey got home he had some good news, and a bill for loads less than he'd expected.

Lankytim · 14-07-08, 05:49 AM

Thats not bad advice... The belt hasnt actually broken, it was the tensioner that had split apart allowing the belt to fall off. The tensioner was welded back together as a temporary measure (halfords was closed!) and everything was refitted. We timed everything up and there was compression but it just wouldnt run. It didnt sound too bad as it turned over, it sounded like it should start! The battery went flat so we towed it around. Nothing, engine kept on "snatching" though. Turns out wed timed it up using the wrong marks on the head and the cam was 180 degrees out. After all that, if it is an interference engine the valves must be bent by now!

A mechanic friend said hed time it up properly this week to make sure the valves really are bent. Once that is done we will know for sure the next course of action to take.

AlanB · 14-07-08, 11:09 AM

Hi Tim,

Pity you got the timing wrong, but I would still try it the right way round.

best of luck!

AlanB

Lankytim · 18-07-08, 03:56 PM

Got it timed up and its broken good and proper. The engine I was trying to buy from ebay sold to someone else- the seller wouldnt respond to any of my emails!

Maybe I should just bosh a new head on it instead of obsessing over 2 litre powah.

Lankytim · 20-07-08, 09:03 PM

Does anybody know if my 1800cc distributor will fit onto a 2 litre 3A engine from an 80?

pimpdriver · 20-07-08, 10:16 PM

No.

If you're getting the whole engine, try and get the dizzy too.

Lankytim · 21-07-08, 03:10 PM

Ok, ill try!

Do you know if the distributor on the 2.0 engine be compatable with the ignition system on 100?

Ben · 21-07-08, 04:55 PM

Quote:

Originally Posted by pimpdriver

No.

If you're getting the whole engine, try and get the dizzy too.

Can you explain why? as the 1.8 carb and 2.0E use different ignition systems.

pimpdriver · 21-07-08, 08:38 PM

Quote:

Originally Posted by Ben

Can you explain why? as the 1.8 carb and 2.0E use different ignition systems.

No. I have a 1.6CL engine (DT) and a 1.8 Sport engine (DZ), and the dizzys look the same.

Aren't they both electronic ignition systems? (i.e. no points but a hall sender)???

14-07-08, 05:49 AM	#13
Lankytim Grown up member Classic Audi Club Member Join Date: Mar 2008 Location: Stoke-on-Trent Posts: 513	Thats not bad advice... The belt hasnt actually broken, it was the tensioner that had split apart allowing the belt to fall off. The tensioner was welded back together as a temporary measure (halfords was closed!) and everything was refitted. We timed everything up and there was compression but it just wouldnt run. It didnt sound too bad as it turned over, it sounded like it should start! The battery went flat so we towed it around. Nothing, engine kept on "snatching" though. Turns out wed timed it up using the wrong marks on the head and the cam was 180 degrees out. After all that, if it is an interference engine the valves must be bent by now! A mechanic friend said hed time it up properly this week to make sure the valves really are bent. Once that is done we will know for sure the next course of action to take. __________________ 1979 Allegro 1500 special (nearly back on the road after resto!) 1993 Audi Coupe 2.6 (non runner at the moment) 1996 Citroen XM 2.5 TD- Veg oil burner. 2004 Fiat Multipla 1.9 JTD ELX. "Eagles may fly high, but weasels don't get sucked into jet engines"

18-07-08, 03:56 PM	#15
Lankytim Grown up member Classic Audi Club Member Join Date: Mar 2008 Location: Stoke-on-Trent Posts: 513	Got it timed up and its broken good and proper. The engine I was trying to buy from ebay sold to someone else- the seller wouldnt respond to any of my emails! Maybe I should just bosh a new head on it instead of obsessing over 2 litre powah. __________________ 1979 Allegro 1500 special (nearly back on the road after resto!) 1993 Audi Coupe 2.6 (non runner at the moment) 1996 Citroen XM 2.5 TD- Veg oil burner. 2004 Fiat Multipla 1.9 JTD ELX. "Eagles may fly high, but weasels don't get sucked into jet engines"

20-07-08, 09:03 PM	#16
Lankytim Grown up member Classic Audi Club Member Join Date: Mar 2008 Location: Stoke-on-Trent Posts: 513	Does anybody know if my 1800cc distributor will fit onto a 2 litre 3A engine from an 80? __________________ 1979 Allegro 1500 special (nearly back on the road after resto!) 1993 Audi Coupe 2.6 (non runner at the moment) 1996 Citroen XM 2.5 TD- Veg oil burner. 2004 Fiat Multipla 1.9 JTD ELX. "Eagles may fly high, but weasels don't get sucked into jet engines"

21-07-08, 03:10 PM	#18
Lankytim Grown up member Classic Audi Club Member Join Date: Mar 2008 Location: Stoke-on-Trent Posts: 513	Ok, ill try! Do you know if the distributor on the 2.0 engine be compatable with the ignition system on 100? __________________ 1979 Allegro 1500 special (nearly back on the road after resto!) 1993 Audi Coupe 2.6 (non runner at the moment) 1996 Citroen XM 2.5 TD- Veg oil burner. 2004 Fiat Multipla 1.9 JTD ELX. "Eagles may fly high, but weasels don't get sucked into jet engines"

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13-07-08, 10:31 PM	#11
AlanB Grown up member Join Date: May 2008 Location: Lanarkshire, Scotland Posts: 103	Hi Tim, Never a great idea to just assume the valves are bent; Even interference engines can run clear! Take a few minutes and either check the valves, or chuck a cheap belt on and try it. If it has survived, it is by far the cheapest option. AlanB

14-07-08, 11:09 AM	#14
AlanB Grown up member Join Date: May 2008 Location: Lanarkshire, Scotland Posts: 103	Hi Tim, Pity you got the timing wrong, but I would still try it the right way round. best of luck! AlanB

20-07-08, 10:16 PM	#17
pimpdriver Devon Pastie Muncher Classic Audi Club Member Join Date: Jul 2007 Location: Calne Wiltshire Posts: 7,530	No. If you're getting the whole engine, try and get the dizzy too.